<template>
  <div class="login_container">
    <div class="login_box">
      <!--        头像-->
      <div class="avatar_box">
        <img src="../assets/images/logo.png">
      </div>
      <!--        表单区域-->
      <el-form
        :rules="loginFormRules"
        ref="loginFormRef"
        label-width="0px"
        class="login_from"
        :model="loginForm">

        <!--          用户名-->
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-username" v-model="loginForm.username"/>
        </el-form-item>
        <!--          密码-->
        <el-form-item prop="password">
          <el-input prefix-icon="iconfont icon-mima" type="password" v-model="loginForm.password"/>
        </el-form-item>
        <!--          按钮-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>

      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data () {
    return {
      // 表单数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 数据验证
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置，移除校验结果并且初始化
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    // 登录按钮事件
    login () {
      this.$refs.loginFormRef.validate(async bool => {
        if (bool) {
          const { data } = await this.$axios.post('login', this.loginForm)
          // 判断成功还是失败
          if (data.meta.status === 200) {
            // 登录成功
            this.$message.success(data.meta.msg)
            // 1.登录成功后 服务端返回的token保存到sessionStorace中
            window.sessionStorage.setItem('token', data.data.token)
            // 1.1项目中除了登录之外的其他api接口，必须在登录之后才能访问
            // 1.2token只应在当前网站的打开期间有效，所以将token存储在sessionStorace中
            // 2.通过编程式导航跳转到后台主页，路由地址/home
            this.$router.push('/home')
          } else {
            this.$message.error(data.meta.msg)
          }
        }
      })
    }
  }
}
</script>

<style scoped lang="less">
.login_container {
  background-color: #006266;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #ccc;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
    }
  }
}

.btns {
  display: flex;
  justify-content: flex-end;
}

.login_from {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
